What is a chemical reaction? Define a single displacement reaction with a relevant chemical equation. | web4study

What is a chemical reaction? Define a single displacement reaction with a relevant chemical equation.



Chemical Reaction:

Any change which alters the composition of the substance is a chemical reaction.

(i) Decomposition reaction:

In Decomposition, a compound breaks into two or more products, usually by heat. e.g. 1. Potassium chlorate on heating decomposes into KCL and liberates oxygen gas.

(ii) Single Displacement reaction:

It is a reaction in which one atom or group of atoms of a compound is replaced by another atom or group of atoms. Example: Zinc replaces Hydrogen in Hydrogen chloride (HCI) to give Zinc chloride.

(iii) Combustion reaction:

It is a reaction in which substances react with the oxygen of air with rapid release of heat and flame. Example: Carbon burns in air and produces carbon dioxide gas and heat is released.


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